What is the first element on the periodic table?

The first element on the periodic table is Hydrogen. This is because Hydrogen has the simplest structure and the lightest atom among all the elements. It consists of just one proton in its nucleus and one electron in its orbital shell. Its atomic number is 1, which indicates its position as the first element. Hydrogen is also the most abundant element in the universe and plays a vital role in various chemical reactions and biological processes.